---
id: CVE-2026-98479
title: >-
  kernel: scsi: libiscsi_tcp: Check the data direction of a Data-In PDU
  (CVE-2026-98479)
summary: >-
  A flaw was found in the Linux kernel's iSCSI TCP subsystem. A malicious or
  compromised iSCSI storage server can cause memory corruption and data
  integrity loss on a connected client by sending an unexpected Data-In Protocol
  Data Unit (PDU)…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L'
cvssSource: vendor
cwe: CWE-358
vendor: Red Hat
product: Red Hat Enterprise Linux 9
affected:
  - enterprise_linux 10
  - enterprise_linux 6
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux 9
  - openshift_container_platform 4
published: '2026-10-18'
updated: '2026-10-24'
sourceUpdated: '2026-10-24T14:23:14+00:00'
source: CSAF
sourceUrl: 'https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98479.json'
references:
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98479.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-98479'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2554867'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-98479'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98479'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98479.mbox
  - url: 'https://git.kernel.org/stable/c/79991b770fc3685b1d5cf805b659a879edd19931'
  - url: 'https://git.kernel.org/stable/c/8db1232945bc663fb94f300090a1fc108de99296'
  - url: 'https://git.kernel.org/stable/c/94e5bdd08e51c450d954bc592f591c233ca5c9df'
  - url: 'https://git.kernel.org/stable/c/de96dc11aee0d058927bff94a168e3c5c46483e2'
  - url: 'https://git.kernel.org/stable/c/e3b25bf2cf2496e85bc05b33360faf9fdf880e03'
  - url: 'https://git.kernel.org/stable/c/ee56b5e18f566c0b5a183379dcd63d402cebf2f8'
  - url: 'https://git.kernel.org/stable/c/24ffc919467d20951f0f132d1c75294e2e91e09b'
  - url: 'https://git.kernel.org/stable/c/bce07e2f37b5e4a427d36fd6b1c14067b27591db'
tags:
  - csaf
  - vex
  - red-hat
  - cve.org
epss: 0.00392
epssPercentile: 0.33139
scores:
  vendor: 6.5
  cna: 7.5
ingestedAt: '2026-10-18T15:45:12.295Z'
---

## Overview

A flaw was found in the Linux kernel's iSCSI TCP subsystem. A malicious or compromised iSCSI storage server can cause memory corruption and data integrity loss on a connected client by sending an unexpected Data-In Protocol Data Unit (PDU) in response to a write command. Because the kernel fails to verify the expected data transfer direction before copying the payload into memory, target-supplied data overwrites the initiator's local buffers or file system cache pages.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98479.json)

**kernel: scsi: libiscsi_tcp: Check the data direction of a Data-In PDU** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-24.

Affected:

- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

No fix planned:

- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4

## Remediation

Out of support scope